Screw-propeller.



G. G. WIELAND. SCREW PROPELLBR. APPLIOATION nun SEPT. s, 1911.

1,012,308, Patented 1390.19, 1911.

3 SHELITS-SHEET 1 G. G. WIELAND.

SUREW PROPELLER.

nmmrunon FILED saw. a, mu,

Patented Dec. 19, 1911.

3 SHEETS'SHEET 2.

INQIEF JTOR [a G. G. WIBLAND. SCREW PEOPELLBR.

nnwulou FILED Barr. 5. 1911.

Patented Dec. 19, 1911.

3 BHEETE-BHEET 3.

4, 5 INVENTOR M 444M i 55 section taken thrdugh another modification;

U ITED; ST ATES Pa'rEN -r OFFICE;

CHARLES o. WIEIIAND,

pa aces.

SCREW-PROPELLER.

Specification of Letters Patent.

]? NEW YORK, N. Y

Patented Dec. 19, 1911,

Application filed September 5, 1911. Serial No. 647,574.

, lowingig specification.

, Entmventwn relates to screw propellers a apted forJuse upon both aerial and 'marine vessels.

These propellers, as usually made, employ a plurality of blades which act upon the water orupon the air to propel the vessel. A 15 lfeat loss of power is, however, occasioned y-rotating them in water for the reason "that a great deal of splashing takes place, and in the air because the blades, as heretofore constructed, are unable to grip the air, as aware, or in other words thrust properly iipon .the'air. I It is one of the objects of the present invention to obviate the defects of the propellers heretofore used, and to provide a 2-5 simple andetfective propeller which will exertgiia pushing effect upon the water or air which is-eonsiderably larger at'a given number of revolutions than that exerted by the propellers-- heretofore in use, whereby a 1 greater speed is obtained.

. With these and other objects in view, which will more fully appear as the nature of the invention is better understood, the same'consists in the combination, arrangement andconstruction of parts hereinafter fully described, pointed out in the appended claims, and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several parts and minor details of constructionfwithout departing from the spirit orsacrificing any of the advantages "of the invention. a v

A few ofthe many possible embodiments of-the invention are illustrated in -the accompanying drawings, in which Figure 1 is a front elevation of a pro peller constructed in accordancewith this invention; Fig. 2 is a side elevation thereof; Fig, 3 is a section taken on line 3-3 of Fig. 1'; Fig. 4: isa front elevation of a modified construction; Fig. 5 is a side elevation of .thismodification; Fig. 6 is a section taken on line G6 of Fig. 4; Fig. 7 is a similar 'The-pe Fig. 8 is a front elevation of a further modification of a propeller made in accordance with this invention; Fig. l) is a side elcvation of the same; and Fig. 10 is a section taken on line 10-10 of Fig-8.

Referring now more particularly to Figs.

1 1 to 3, inclusive, the numeral indicates a hub, having an opening 21 therethrough to receive the propeller-shaft; Projecting from the hub are two similar blades 22, 22, of a my size and pitchwhiclrmay be varied lCCQICl". ing to the requirements. In the drawings,

theblades' and the hub have been shown as .a single casting, but it will-be easily'seen "that the blades may be made separately and 79;

attached to the hub in any suitable manner;

. The propeller, as described thus far, is in all respects similar to those heretofore used.

NVith each blade is made integral. a wall 23, which extends from the peripheral portion of the blade toward the hub 20. More particularly, thewall joins the peripheral edge 24 of the blade, is spaced apart from,, the blade, and extends toward the hub'QOh through a distance which corresponds about 3Q to one-half of the length of the blade, and merges then at 25 into the blade. The wall 23 runs throughout the widthof the blade substantially parallel with the same, but inclincs to some extent from the leading edge 5 the surface of the propeller and the inner surface of the wall 223, and which gradually increases in cross section from the leading edge 26 toward the following edge 27, or in other words, the area of the conduit decreases gradually from its inlet 29 toward its outlet 30.

The operation of this propeller is as follows: \Vhen rotatio l is imparted to the same by the motor of an aerial vessel, an air current will-be created by the blades and the outer surfaces of the walls 23, 23 in a direc- 106 tion substantially parallel with the longitudinal axis of the propcllershaft. At. the. same time air will enter at the leading edges the conduits 28,-and be compressed to some extent as it passesthrough the gradually de-i 1-10 creasing areas of said conduits, thereby increasing the thrust of the propeller blades upon the air.' fl wing to this increase of by a pluralityof substantially parallel par titionsf31, 31 into a number of passages 32, 32,the' inlets of which are larger than the outlets 34: thereof. The operation of this'device is all respects similar to-that of the device shownin Figs. 1 to 3, inclu-' sive, of the drawings, the only difference being that a pluralityof air currents will be created by the passages. 32, such air curs rents. being parallel in direction.

. In Fig.7 of the drawings a modification of the propellers shown in FigsA: to 6, in elusive, is illustrated. The passages 32 of this propeller are provided with outlets 34,

which 'direct'the air passing through said passages in a direction substantially par- -allel to the longitudinal axis of the propeller shaft ;for the reason that the walls 28 "are curved forward at their edges which register with the following edges 27 of this 30 propeller, as' clearly shown at 35. It is obvious that the air currents created by? the passages of this propeller aid to a great v extent the currents created by the blades of the same, since both sets of currents flow in the same direction.

A further modification of the device is illustrated in Figs. 8 to 10, inclusive, in which the hub 36 is'provided with the usual blades 31?, '37, and uponthe outer portion 4010f eachblade is provided a pocket 38 ex tending from the periphery 39 of each blade "toward the hub through a distance which corresponds to about one-half of the length of the blade. The pockets are open at the leading. edges 40 of the blades, and pro- .vided with a plurality of substantially.par-- allel partitions 41, 4:1, dividing the same into number of passages 42' Whichare gradually decreasing from theleading edges 40 toward the following edges 4:2 of the propeller. Each passage is provided near to the following edgeAQ with an outlet 48' which is arranged in a plane substantially parallel to the blade of the propeller. 5 The operation of this device is as follows: In rotating thepropeller, a current of air or water, a-s the case maybe, willbe created 7 by the blades and the outer surfaces of the. pockets 38, of course, in a direction sub-' stanti'ally parallel to. the longitudinal axis of the propellershaft, not taken-intoconsideration the splashing action of the'propeller. The air which enters the-passages 42"is highlycompressed as it passes toward the outlets 4B, through'which it is forced tially parallel with the longitudinal axis of out by the rotary action of the propeller in the direction of the longitudinal axis of the shaft of the latter. The reaction of the air through the passages 42 will 'not-be com-- pressed, but its speed increased owing to the decreasing cross section of the passages toward their I outlets. The result will, of course, be the same as the one described in connection with-the aerial vessel.

What I claim is a I 1. A propeller comprising a hub,'and a plurality of blades projecting therefrom' provided with conduits running fromtheir leading edges toward their following. edges substantially parallel with the faces of said blades and gradually decreasing in cross section toward their following edges.

2-. A propeller comprising a hub, and a plurality 'of blades projecting therefrom pI'OXlClGCl with conduits running from their leading edges to their following edges sub stantially parallel with the faces of said blades and gradually decreasing in cross section toward their following edges.

'3.A propeller comprising a hub, and a plurality of blades projecting therefrom' pro'videdvwith conduits running from their leading edges toward their following edges substantially parallel with the faces of said blades and being provided with outlets adapted to discharge the. air passing through said conduits in a direction sub-. stantially. parallel with the longitudinal axis of said'hub.

4. A propeller comprisinga' hubl and a plurality ofblades projecting therefrom provided with conduits running from their leading edges toward their following edges substantially parallel with the faces of said blades and gradualv decreasing in cross section toward their following edges, saidconduits being provided-with outlets adapted to discharge'the air passlng therethrough in a direction substantially parallel with the longitudinal axis of said hub.

.5.- A propellercomprising a hub, and a plurality of blades projecting "therefrom provided with conduits running from their leading edges to their following edges substantially parallel with thexfacesofsaid blades and being provided withf-outlets' adapted to discharge the air passing through said outlets in a direction substan said hub. v 1 .5

6. A propellercomprising a hub, and a plurality of blades projecting. therefrom provided with conduits running from their leading-edges to their following edges sub-" stantially parallel with the'faces of said 39 blades and gradually decreasing in amass How York and. NW4: oi? Tow "HM-in, mil-1 section toward their following edges, said 5312111 (11:13; of 'lazpiomimr, ER. MMWLL conduits being provided with outlets ndzlpb (If A F H W I w A q n M ed to discharge the airpassing thorethrollgh I 5 in a direction substantially pr 'allol with the Vfifiidlkfififirfl longitudinal axis of said hub. Hummo 4:

Signed at New York, in the county of 6%. "iiumznmhm 

